Abstract: A nut for use on roadways, runways, in reinforced concrete construction, and the like, possesses a generally circular shape, with spherical top and bottom surfaces connected by a cylindrical side wall. A central aperture formed through the nut is threaded for engagement with an anchor bolt secured in a roadway surface by a conventional epoxy. Four smaller diameter threaded apertures are disposed on a common circle adjacent a peripheral edge of the nut, evenly spaced at ninety degree angular increments. The smaller diameter apertures are utilized in conjunction with a spanner wrench to tighten the nut on an anchor bolt. After the nut is tightened securely into position, an externally threaded drill guide bushing is engaged within each of the four smaller diameter apertures and utilized to drill a coaxial cylindrical bore in the roadway surface.